One: per the manual, the HD/+ use exFAT when formatting SDHC cards. FAT32 has file size limitations (2 or 4 GB per file depending on signed or unsigned integer); exFAT can work with much larger files. Win7 should understand exFAT but you may need to download a patch from M$ if you are running WinXP.
Two: on the HD/+ the internal memory is mounted as "/sdcard"; real SD cards are mounted as "/ext_sdcard". This can confuse applications that expect "/sdcard" to refer to a removable card.
Whether you format or reformat the SD card as exFat or FAT once you insert it into the Nook it will automatically "change" the format of the card to a "generic hierarchial" format which I was told by someone who works for B&N and is fairly Nook experienced, is a similar type storage format. The card seems to be working now the only issue is once I seem to hit a certain number of books it will start showing an error message via Calibre that is a "tmp low memory in line....." even tho the card itself shows 57gbs left......will have to get the exact wording. Most of the ebooks I load are fairly small but there are a few medical texts that are very large and graphic intensive.......
Thanks for all the information
I have a Sandisk 32GB microSDHC card in my HD+ (Firmware 2.1.0) and have more than 10,680 books on it. No problem. The books are in directories by author. No more than about 150 books in any one directory. I use Cool Reader for viewing. I flattened Calibre's "Save to Disk" directory structure. Then I used Windows Explorer (Win7) to copy my Books directory onto the microSDHC card. Note that I let the HD+ format the microSDHC card before I did any copying.
Greetings dear Forum,
I recently bought a new Nook HD+ with 32gb of internal memory in order to take advantage of B&N's 2013 Mother's Day Nook HD+ discount ($209 for the HD+ with 32gb).
And as others have done before me, I wanted to expand its SD card memory capacity as far as it would allow me. After researching this topic, I decided to purchase a Kingston, SDCX10, 64gb class 10 microSD card. The reason to specifically buy a Kingston 64gb microSD card is that various people have commented that a Kingston card is more stable than a Sandisk card when it comes to the microSD card formatting options.
Anyway, the microSD card arrived today and after powering down my Nook HD+ (not even sure if this is necessary, but it wouldn't hurt), I inserted the 64gb card. My Nook HD+ powered up without a hitch and with no apparent microSD card formatting. My Nook HD+ showed "63.24GB" available (0.41GB used by file formatting), although technically speaking, 63,333,990,400 bytes translate into 58.9GB, -but I digress.
Interestingly, this 64GB microSD card had the "exFAT" formatting, whereas an older Kingston 32GB class 4 microSD card in my possession had the "FAT32" formatting.
Regardless, I am very pleased indeed to report that my new Kingston SDCX 64gb microSD card works flawlessly. I copied ebooks, movies, music etc. from the 32gb microSD card onto the 64gb card and all works just great!
I purchased the 64gb microSD card via Amazon for $57.99 (free shipping, no tax). The item's p/n is: Kingston Digital 64GB MicroSDXC Class 10 Flash Card (SDCX10/64GB).
Whatever else out there works, Kingston works for me!
I wanted to "edit" one sentence in my previous response, but the B&N system didn't let me (why??). The sentence I wanted to edit was: "My Nook HD+ showed "63.24GB" available (0.41GB used by file formatting), although technically speaking, 63,333,990,400 bytes translate into 58.9GB, -but I digress."
What I want to change is that although my Nook HD+ shows 63.24GB available for my Kingston 64gb microSD card, my computer on the other hand only "sees" 63,333,990,400 bytes available, for a total of 58.9 GB.
Sorry for the confusion!
Viewmont, thanks for sharing details on a card and card size and format that works.
Hard drive and flash memory card manufacturers report memory in factors of 1000. So a 64 GB microSD card has 64,000,000,000 bytes, less memory used for formatting.
See this FAQ from SanDisk's website:
Kingston, SDCX10, 64gb class 10 microSD card. The reason to specifically buy a Kingston 64gb microSD card is that various people have commented that a Kingston card is more stable than a Sandisk card when it comes to the microSD card formatting options.
Viewmont, I am looking for a 32g for my HD, I read the same info you read about Kingston being more reliable than other brands for the HD/HD+ or at least it will work. However after reading your post and checking out amazon + a couple of other retailers, there are numerous comments that the transfer rate for Kingston SDCX10 is NOT as advertised, instead of 10mb/sec the numbers are around 6mb/sec.
Can you test yours or comment please.